An autopsy has revealed Marshall died from heroin and benzodiazepine intoxication, according to Chief Deputy Coroner Charlie Dastych. Benzodiazepines can be used for muscle relaxation or seizure control.

The Roselle Police Department said Friday an investigation remains ongoing.

Marshall gained national attention in 2014 after he won Season 4 of Spike TV’s hit show “Ink Master,” beating out 16 other artists from around the country and earning $100,000 and a feature in Inked magazine

Marshall’s wife, Johanna, told TMZ after his death that Marshall told her he wasn’t feeling well and decided to get a hotel room after work instead of driving home.

Johanna said police officers arrived at her home the day after his death and told her that her husband had passed away in his sleep, TMZreported. She said authorities told her preliminary autopsy results showed he died from an unspecified heart issue.

A spokesperson for Spike TV also released a statement on Marshall’s death.

"Spike and entire Ink Master family are stunned and saddened by the news of Scott's passing. He was a great competitor and talented artist," the statement read. "Our deepest condolences go out to the Marshall family and friends."